I absolutely love South Park! It's actually an incredibly intelligent show and the creators are really talented people. I've seen interviews with them, and they're pretty funny. I also like how completely un-PC it is.
My favorite episodes are the ones where all the men become metro sexual and the characters on Queer Eye for the Straight Guy are actually crab people, and the one where they go to Afghanistan and end up getting captured by Osama Bin Laden. And of course, the one where Stan goes goth for a while.